Presentation on logical_operators
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Logical Operators ICT Level V COT - Jaffna 1 S.Sakthybaalan
Transcript of Presentation on logical_operators
1
Logical Operators
ICT Level VCOT - Jaffna
S.Sakthybaalan
05/01/20232
Operator An operator is a symbol that tells the compiler to perform
specific mathematical or logical manipulations.
C# is rich in built-in operators and provides the following kinds of operators:
Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators Misc Operators
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OperatorsArithmetic Operators
Relational Operators
Bitwise Operators
Assignment Operators
Misc Operators
Logical Operators
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Logical Operators (Conditional Operators) Logical operators allows you to combine multiple
conditions.
These operators involves at least two conditions and the final Boolean result is determined by the operator being used.
AND
OR
XOR
NOT
Logical Operators
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Operand and Operators In all computer languages, expressions consist of two types of
components: operands and operators.
Operands are the objects that are manipulated.
Operators are the symbols that represent specific actions. example:
5 + x Note: All expressions have at least one operand.
operator
operands
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AND Operator (&&) The AND operator is used to compare two Boolean values.
It returns true if both of the operands are true.
a b Result (AND)
0 0 00 1 01 0 01 1 1
0 – false
1 - true
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AND Operator in Programmingname = "Steven";
password = "Steven123"; // evaluating both expression and returns true if all are true. if (name == "Steven" && password == "Steven123")
{ MessageBox.Show("Login Successful");}
else
{ MessageBox.Show "Unauthorised access");
}
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OR Operator (||) The OR operator is similar to AND, as it is used to
compare two Boolean values.
The OR operator returns true if either of the operand(s) are true.
a b Result (OR)
0 0 00 1 11 0 11 1 1
}0 – false
1 - true
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OR Operator in Programming
string username, password; if ((username == "Steven" || username == “Clark")
&& (password == "Steven123")){ MessageBox.Show("Login Successful");}
else
{ MessageBox.Show("Unauthorised access");
}
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NOT Operator (!) The NOT operator is a unary operator, as it operates on a
single operand.
The NOT operator inverts the value of a Boolean value.
If the original value is true then the returned value is false; if the original value is false, the return value is true.
a Result (NOT)
0 11 0
0 – false
1 - true
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NOT Operator in Programmingname = "Steven";password = "Steven123"; // evaluating both expression and returns true if all are true. if ( !(name == "Steven" && password == "Steven123"))
{ MessageBox.Show("Login Successful");}
else{ MessageBox.Show("Unauthorised access. Aborting…");}
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XOR Operator (^) It returns false if the following condition matches:
(i) if both or all the expression returns true.
(ii) If both or all the expression returns false.
a b Result (XOR)
0 0 00 1 11 0 11 1 0
0 – false
1 - true
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XOR Operator in Programmingstring name, password;
name = "Steven" ;
password = "Steven123" ;
//it returns false because both expression match. if ((name == "Steven" ^ password == “Clark")
{
MessageBox.Show(“Access granted…");
}
else
{ MessageBox.Show (“Access Denied. Aborting…”);
}
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